Jones - Knows offense, was smart enough in college to call the plays and a clear upgrade over Williams/Smith at LG - would be solid both run and pass if upgraded strength from last year.
Wells - C position incumbent. Knows offense inside and out, would be better than last year, slight upgrade to position from last year just based on better health (former pro bowler). Solid depth at center behind him.
Long - Mathews or Robinson might be upgrades at this point at LT (if we get one of those two)
Barksdale - knows offense, played well at RT
RG - this is the key and likely we have to draft one. Gabe Jackson or another top prospect in round 3 could be a Rodger Saffold replacement. The draft is very deep here so no reason we cannot find a good player. Rams will have to hit on the pick at this position.
Wild Card - Jake Long ends up being moved to RT if rookie LT performs immediately. That means Barksdale can be new RG. That means only rookie starting is LT Matthews or Robinson. Thus we are not as inexperienced as perceived.
Overall - we are putting pressure on coaches to develop and make players perform. It's not unreasonable to project maintaining performance. Barksdale can play LT adequately with knowledge of system to give Long 4 weeks coverage at beginning of season.
It is clear, whoever we draft in rounds 1-4 will be a talent upgrade to what was rostered last year. We will just have to be good and lucky to coach that talent up quickly.
In fact, I want the heat to be on the offensive coordinator to raise his own performance instead of just relying on the OL coach to be the hero!